Ohio Rev. Code Ann. § 2923.16
(C) No person shall knowingly transport or have a firearm in a motor vehicle, unless the person may lawfully possess that firearm under applicable law of this state or the United States, the firearm is unloaded, and the firearm is carried in one of the following ways:
(D) No person shall knowingly transport or have a loaded handgun in a motor vehicle if, at the time of that transportation or possession, any of the following applies:
(E) No person who has been issued a concealed handgun license or who is an active duty member of the armed forces of the United States and is carrying a valid military identification card and documentation of successful completion of firearms training that meets or exceeds the training requirements described in division (G)(1) of section 2923.125 of the Revised Code, who is the driver or an occupant of a motor vehicle that is stopped as a result of a traffic stop or a stop for another law enforcement purpose or is the driver or an occupant of a commercial motor vehicle that is stopped by an employee of the motor carrier enforcement unit for the purposes defined in section 5503.34 of the Revised Code, and who is transporting or has a loaded handgun in the motor vehicle or commercial motor vehicle in any manner, shall do any of the following:
(F)
(1) Divisions (A), (B), (C), and (E) of this section do not apply to any of the following:
(2) Division (A) of this section does not apply to a person if all of the following circumstances apply:
(d) The person does not discharge the firearm in any of the following manners:
(3) Division (A) of this section does not apply to a person if all of the following apply:
(d) The person does not discharge the firearm in any of the following manners:
(4) Divisions (B) and (C) of this section do not apply to a person if all of the following circumstances apply:
(5) Divisions (B) and (C) of this section do not apply to a person who transports or possesses a handgun in a motor vehicle if, at the time of that transportation or possession, both of the following apply:
(6) Divisions (B) and (C) of this section do not apply to a person if all of the following apply:
(G)
(H)
(2)
(K) As used in this section:
(5)
(a) "Unloaded" means, with respect to a firearm other than a firearm described in division (K)(6) of this section, that no ammunition is in the firearm in question, no magazine or speed loader containing ammunition is inserted into the firearm in question, and one of the following applies:
(b) For the purposes of division (K)(5)(a)(ii) of this section, a "container that provides complete and separate enclosure" includes, but is not limited to, any of the following: